Carburetor jet and control therefor



July 18, 1933. F. w. SCHAFFNER 1,919,134

CAHBURETOR JET AND CONTROL THEREFOR Filed March 2, 1932 BY My ATTQRNEY5 Patentecl July 18, 1933 v r 19 3 i a DE Q W. SCHAFFNER, or igaooxt'yu; mwyo 2 i CARBURETORVJ'ETJAYND CONTROLITHEREFOB 7 Application file d Mach 2, 1932. sermi 5596;352. (Dhisiuveutioh relates to jets autl controle huretor anclconstructedei ili d eifi fh therefor-:especially adapted for carburetors my invent-ion. v v, a

and preferably oftt'hetype setforth in my -Figure 2-iS L plan iview ehowingohe sec co-pending application filed Se tember-Y 3; tion ofthejcarburetorkwith thegjet mounted 193l,'-Serial N o. 561,068,;which maturecljto therein and properly centered V with the Patent 11,862,434, granted June 7, '1932' and guides of the slidingga'tes l u t; I has fori the primary object; the aprovision of c iF gure 3..- s a fragmentary ert cal, secv a device of -the abovestated character which tionalvlew illustrating the gates associated will elliciently oleliver":;tue1 -to the venturi With the jet. 60

no 'of the carburetor, sothat the fuel in proper Figure-t-is -a perspective illustrating 7 o amounts, will":quickly and thoroughly mix one of the'jet centering-elements re vable With' airto produce a volatile mixturecapafrom'the Je t p e a er tQ 35 1? ble ofproclucingmaximumpower'when igcleansed I a a v nitecl in an engiiie and free of unvaporized Referr ng m detaul to the drawing, the

fuelfthereby eliminating Waste of fuel aucl numeral 1 indi s rag en y p r 53? i112 '{Iate valves which also control the air formed n g y with alfuelchambfil A further object of this inventionis the g5 sliclo'smoothlj relative thereto anclwith'wip- (A fuel tu b i ti fyth n I ,of a carburetorconstructed accordaiice Another object-of this invention is' the Dr0- h fll? y l l tim t v f y -Pq mg Vision'ofa 'T-shap'etljet having aseries of pp p 'i 'ue i 0 1L 0 I jet openings successively controlled} byslid-c chambelfa n lnlet 3 A and m to the venturi of the carburetor in uroper Theuppelelld f hee m 2- ang amounts to the'amounts of fuel and said gates tolform Seats for l mgqg V i 9P- havirlg Wiping contactwith the jet causing @Pated y e e p e't t r I v "cauil'larvaction to the fuel within the jet ofthe w to n ert "to deposit the fuel on the exterior ofrthejet -v es e l n e dt ius preacl globules renclering the fuel easy h 9 l Valve l that durlng to take'up by the suction of the engine-and fl s n r pemn th e flev e the passing of the air by thejjet. the gate Valves W111 P WK -Y, lt Wards each other-respectlvely which controls gtheamount of air into the venturi 'Z ofthe carburetor in accordance with 1 the speed of theejngi ne. {The Yenturi at its; lower'end is remjovably secured to the seats 5 of the mixing chamber.

provision of "means for removably mounting:

the jet in a carburetor and having Ineaus for properly centering or positioning thereof in the carburetor so 'that the gate valves may Y 1 l b be8is removablymounted in the A t i I i o cl fro ii he Gal ureter twee-n the larttepan-d ltsllnta-ke aandhaslone" m lenlen v4 U ,end ncommumcatwn Withthe fuel chamber 4.. v Thetube- 7 has .anl'opening ztherethrough \Vith theseautl othero'bjects iii View, this flignvention cousieteiucertain novel features to receivethe lower: Ort'ion of a T sha ed of construction; conibinatiomancl arrange- 9 o w g p d -dw i merit of parts t-o behereinafter more fully g Communication th v Clf2-SCIibed'flI1d x a the interior of the fuel tube 7' for the purpose F r a c mp et nd rs n f ofreceivingfuel therefrom. A shoulderll "61150117 reference is Q be had e is formed on the'jet 9 and flrests against thefl' inc: d s rip n n a mp ny g w n jet-swhile-the l w'erend ofthetuhe is closed in-av-hich j i 1" land screwthreadeclto receive a nutf12 c'oop Figure 1 is a fragmentary verti'cal seccrating withthe shoulderilliin detachably. t-ional View illustrating acarburetorwith a securing the jet'to t-hetubeg The head 13 O jet, and controlthereforamountedin'thejcar-, extender-across the airichamber 2 where the latter communicates with the venturi and is provided with a series of jet openings 14 1D. the top face thereof. The ends of the head 13 are opened and closed by removable plugs 15 having formed integrally therewith finger pieces 16 to permit the plugs to be easily gripped for application and removal from the head and normally seat in slots or notches 15 formed in the valve seats 5 for the purpose of aligning the head 13 with guide grooves 16 formed in the seats 5 and which slidably receive guide flanges 17 for'ined on the gate valves. The top face of the head is flat and the side walls of said head taper towards the flat wall as shown in Figure 1 to be engaged by the guide flanges 17 on the gate valves with the latter in wiping contact with said flat top face of the head. The removable plugs permit the head to be'easily cleansed of any foreignmatter when removed from the carburetor and also form centering means for aligning the head with the guide flanges of the gate valves when the jet is-mounted within the carburetor.

i The adjacent edges of'the gate valves are notched for the purpose of always allowing one of the jet openings to beuncovered'to permit sufficient fuel, to enter the venturi for maintaining the engine running at idling speed. These notches also permit suflicient air to pass into the venturi when the gate valves are in closed position to support the amount of fuel entering the venturi for the urpose of maintaining the engine running at saididling speed;

Asthe throttle valve (not shown) 1S moved towards an opened posit onthe gate valves simultaneously move apart with a wiping contact with the head 13 of the jet causing a capillary action on and depositing the fuel on the flat surface of'the head in spread or elongated globules so that the suction can easily pick up the fuel alongwith the air andthereby giving the "engine to'which the carburetor is applied quick acceleration. It is to be understood that the sliding movement of the gate valves successively open and close the jet openings in accordance with the speed of the engine, thespeed of the engine being controlled by the throttle valve.

The above construction described permits the jet to be easily removed from the carburetor when desiring to clean the same an due to the removable plugs 15 a small instrument or wire may be run through the head and also through the vertical portion of the jetby way of the openings 10 to remove therefrom any foreign matter which may have become trapped within the jet.

While I have shown and be understood that minor changes in con opened ends of the head,'and

1 gaging the carburetor ing the venturi and the fuel within the jet described thepre- "ferred embodiment of my invention, it will' the spirit and scope of my invention, as claimed.

Having thus described my invention, 1 claim is 1. A. carburetor jet comprising a hollow T-shaped element to receive fuel and including leg and head portions, said head portion in the top wall thereofhaving jet openings, said head portion having its ends opened, removable plugs for closing the means on sai plugs to facilitate the removal and application of the latter to the head, said means enfor centering the T- shaped element within the carburetor.

2. In combination with a carburetor having an air chamber and a fuel chamber, a T-shaped jet in. the air chamber and communicative with the fuel chamber and including leg and head portions, said head portion having a flat top face provided with jet what openings, sliding gatevalves. carried by the 3. A carburetor comprising a body having I and notches, a venturi formed a fuel supply element traversprovided with jet openings for directing fuel into the venturi, sliding gates carried by thebody andhaving wiping contact with the element to control the jet openings thereof, guide means on the gates and slidable in the grooves and against said element, and means on theends ofthe element and fitting in the notches to align said element with the grooves and guide means. 1 I,

1. Acarburetor comprising a body having guide grooves and notches, a venturi formed in said body, a fuel supply element traversing the venturi and provided with jet openings for directing fuel guide grooves in said body,

into theventuri, said element having opened ends, sliding gates carried by the body and having wiping contact with the element to control the jet openings thereof, guide means on the gates and slidable in the grooves and against'said element, and removable means closing the ends of the element and fitting in the notchesto align said element with the grooves and guide means and to permit cleaning of the element when removed from the-carburetor.

5. A carburetor comprising a body having guide grooves and notches, a venturi formed in said body, a fuel supplyelement traversing the venturi and provided with jet openings for directing fuel into the venturi, said element having, opened ends, sliding gates carried by the body and having Wiping contact with the element to control the jet openings thereof, guide means on the gates and slidable in the grooves and against said element, and headed plugs threaded in the ends of the element and fitting in the notches to align said element with the grooves and guide means and to permit cleaningof the element when-removed from the carburetor.

6. A carburetor comprising a body having guide grooves and notches, a venturi formed in said body, a hollow fuel supply element traversing the vent-uriand having a flat top face provided with openings, said element having bevelled sides and opened ends, sliding. gates carried by the r element when removed from the carburetor.

FREDERICK W. SCIIAFFNER,

of the element, and re- 1 of the ele{ align saidguidefianges 

